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Protein S Blood Test
Protein S Blood Test
Protein S Blood Test
Protein S Blood Test

Protein S Blood Test

A blood test to measure levels of the anticoagulant protein S.
Blood sample 1 biomarker included 5 working days turnaround

What's included?

Biomarker profile

  • Clotting Status

Clotting Status (1 Biomarker)

Special instructions

Ensure no Coumadin, estrogen or anticoagulants taken in last 10 days. Clinical history must be provided.

Protein S is a natural anticoagulant in the blood. It works by activating another protein (protein C), which plays an important role in blood clotting.

Some people can be deficient in protein S, which increases the risk of blood clot formation. This in turn can lead to a raised risk of venous thromboses, which can be life-threatening.

Whilst some cases of protein S deficiency are genetic, its levels can also be reduced by other factors such as having liver disease or a vitamin K deficiency (which may occur in warfarin users).

Dr Sam Rodgers MBBS, MRCGP

How it works

  • Take the test

    Collect your sample at home, visit a partner clinic, or we can even send a nurse to you.
  • Post your sample

    Send your sample back on the same day you take it in the freepost pack to our laboratory.
  • Get your results

    View your results with doctor's advice on your personal dashboard.
Laboratories you can trust

Laboratories you can trust

Trusted by the NHS and private clinics alike, you can be sure of the highest testing standards from our fully accredited partner laboratories.

Expert interpretation <br>
of your results

Expert interpretation
of your results

One of our team of doctors will review your results and give you personalised advice based on your medical history, lifestyle and health and fitness goals.

Your personal<br>
health centre

Your personal
health centre

Discover the easy way to track your health through our online portal, View your results with doctor's advice, monitor any changes over time and see the improvements you can make to your health with simple lifestyle changes.

Questions? Let us help

Questions? Let us help

Our customer care team is on-hand to help you find the test that's right for you. Get in touch via phone, live chat or email.

What our customers say

We ask every Medichecks customer about their experience - read what they have to say


Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.